<ul class="layui-nav layui-bg-green" lay-filter="" id="">
    <li class="layui-nav-item" id="addcla"><a href="/admin/class">班级添加</a></li>
    <li class="layui-nav-item" id="clalist"><a href="/admin/clalist">班级列表</a></li>
</ul>
<a href="/admin/login" class="exit_login">[退出登录]</a></li>